In this work, as in others from around 1920, Ernst uses for his support a page from a teaching-aids catalogue that promulgated the "purposeful expansion of the sensory activity of children," and to that end advertised devices to assist teachers in delivering "lessons in visual perception" (Anschauungsunterricht).

When we put on a gig it's just an explosive cavalcade of sensory activity," says knob-twiddler Robin Jones, adding, "I'm learning how to cope with society again - months on the road have left me institutionalised.

Once you've determined the location for your room, Samantha White, sensory activity leader for Camp Jened, recommends that you begin by dividing the room in half by hanging black shower curtains down the middle of the room.

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